HIGH RESOLUTION INFRARED SPECTRA OF $^{120}SnD_{4}$

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1996

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Ohio State University

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High resolution FTIR spectra of the $\nu_{2}/\nu_{4}$ and the $\nu_{1}/\nu_{3}$ bands of $^{120}SnD_{4}$ have been measured with a Bruker 120 HR interferometer. The sample was prepared under vaccum using a two step synthesis. The $\nu_{2}/\nu_{4}$ region ($425-620 cm^{-1}$) was studied using a liquid He-cooled bolometer, while an MCT detector was used in the $\nu_{1}/\nu_{3}$ region ($1275-1455 cm^{-1}$). The resolution of the spectra are $0.0033 cm^{-1}$ and 0.0024$cm^{-1}$, respectively. The measurement of the first and second stretching overtones is in progress, too. The results will be compared with those of normal stannane, $SnH_{4}$. In the case of normal stannane vibrational localisation has been found to take place in stretching vibrational overtones. Thus the dynamical symmetry of stannane, a spherical top molecule, has been found to become that of a prolate symmetric top.

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$^{a}$Permanent address of M. and L. Halonen: Laboratory of Physical Chemistry, P.O. Box 55 (A.I. Virtasen aukin 1), FIN-00014 University of Helsinki, Finland
Author Institution: Department of Chemistry, Princeton University; FB9-Anorganische Chemie, Universit\""{a}t-GH Wuppertal

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